A northwest Mississippi teenager has resurfaced in Illinois four days after he went missing.Olive Branch police say 14-year-old John Aubrey Peal III turned himself in Sunday at an Illinois fire station.Peal had been missing since Wednesday. His parents told WREG that Peal left after he made plans to meet someone in person whom he contacted using Discord — a video game-centered chat program.The teen's sister said he was in his room Tuesday night chatting with someone on Discord. The next morning, his window was open and his wallet, phone and charger were gone.Peal explained to his sister how the app works: "He said 'You can just type in the show you like and there's like, a whole bunch of group chats on it.'"Peal's parents say they knew nothing about the app. Peal’s father says his son turned himself in after seeing social media posts about his disappearance. Police confirmed that the teen met up with someone from the gaming app.Olive Branch police say they continue to investigate.Developer Discord Inc. tells WHBQ-TV that it urges users to only chat with people they know, and urges parents to teach children about the risks of communication with unknown people.Callahan Walsh, an advocate for the National Center for Missing and Exploited Children, told WREG that parents shouldn't rely on policies apps put in place to ensure safety. "What we see is the exploiters are savvy to that. They'll move the conversation to other areas that aren't as regulated," Walsh said. "Make sure your children aren't meeting anyone in the real world that they only know online. It's also important for parents to set ground rules and stick to them. And then have ongoing conversations with your children about safety."

A northwest Mississippi teenager has resurfaced in Illinois four days after he went missing.

Peal had been missing since Wednesday. His parents told WREG that Peal left after he made plans to meet someone in person whom he contacted using Discord — a video game-centered chat program.

The teen's sister said he was in his room Tuesday night chatting with someone on Discord. The next morning, his window was open and his wallet, phone and charger were gone.

Peal explained to his sister how the app works: "He said 'You can just type in the show you like and there's like, a whole bunch of group chats on it.'"

Peal's parents say they knew nothing about the app.

Peal’s father says his son turned himself in after seeing social media posts about his disappearance. Police confirmed that the teen met up with someone from the gaming app.

Olive Branch police say they continue to investigate.

Developer Discord Inc. tells WHBQ-TV that it urges users to only chat with people they know, and urges parents to teach children about the risks of communication with unknown people.

Callahan Walsh, an advocate for the National Center for Missing and Exploited Children, told WREG that parents shouldn't rely on policies apps put in place to ensure safety.

"What we see is the exploiters are savvy to that. They'll move the conversation to other areas that aren't as regulated," Walsh said. "Make sure your children aren't meeting anyone in the real world that they only know online. It's also important for parents to set ground rules and stick to them. And then have ongoing conversations with your children about safety."